Combination adjustable hygienic desk and seat.



A. C. ARMSTRONG. COMBINATION ADJUSTABLE HYGiENIC DESK AND SEAT,

APPLICATION FILED JUNE 17, 1913.

Patented June 8, 1915. I

Be it known that ITED s mples 'A-T OFH E. f

ANDREW CECIL anns'rnone, or sAwYnms-vALLEy, wns'rr'imr AUSTRALIA,

f i AUSTRALIA. f

COMBINATION ADJUSTABLE HYGIENIC DE S K AND snA'r.

Specification of Letters Patent- Patent d June; 8 19 Application filed June 17, 1913. ser1a1'ao.774,2ea.'

To all whom it may concern.

1, ANDREW CECIL ARM- s'rnoxo, a subject of the lung of Great ?Britain, and residing at Sawyers Valley, g'ilrvcstern Australia, Commonwealth of Aus- V Hygienic Desks and Seats,

the improved have inventedicertain new and useful Combination Adjustable of which the foltralia, Improvements 1n lowing is a specification.

The present invention refers to chairs, and it comprehends, briefly, an improved article of furniture of the class or character spec fied, which is designed primarily for use in school rooms and the like, and which is so constructed as to be adjustable to various heights and inclinations relative to the desk associated therewith.

An embodiment of the invention is illustrated in the accompanying drawing, wherej of 2-- a side elevation showing both chair and the desk with which it is used; Fig. 2 is a plan view; and Figs. 3 and 4 are detail views showing the mounting of the seat-supporting bar.

Referring more particularly to said drawing, the seat a of the chair, which may be made of wood or other suitable material, is provided upon its lower face, adjacent the ends thereof, with cross-rods a, the rear ends of these rods being hinged at a to the lower ends of a pair of depending back rods a which, in turn, are pivoted at their upper ends to a horizontal bar a. The forward portions of the rods a are notched, as shown, and are adapted to be engaged by a lower horizontal barb, whose ends are connected by chains 7 with those of the bar 0.

The aforesaid bar 0 is adjustably attached, as hereinafter described, to the side members of an inverted U-shaped frame d whose arms have rearwardly curved upper portions, as shown, and are pivoted at their free lower ends to lugs or feet (1 fastened to the floor or base plate (1 so that the said frame may thus be swung either forwardly or rearwardly, suitable brace rods or other sup ports 9 pivoted at their lower ends to the central portions of the frame sides and in-' terchangeably in holes g in employed to Figure l is the floor or base plate being hold the frame in adjusted position. The forward surfaces of the upper engaged at their lower ends @(Figs. 3 and 4),

ehangeabl'y rcceivetherein the stems of clips 6, carried by bar 0, said clips thus supporting said bar at any desiredheight upon the frame; and the rods a which are likewise connected to said bar, as previously stated, are also held in position, these rods having secured to them the member or members constituting the back of the chair.

In consequence of the construction and arrangement of parts above described, it will be apparent that the chair, as a whole, may be moved forward or backward by swinging its frame (Z, and may be retained in position subsequent to adjustment by means of the braces g. Also, the seat a may be moved both upward backward, independently of and relatively to the frame, thus adapting the chair to pupils of various sizes and enabling its'occupant to assume the positions proper both for writing and for reading.

The chair above described may be used with any desired type of school or other desk, that shown consisting of a pair of vertical posts or standards 9' provided, each, with a series of transverse openings j adapted to interchangeably receive therein the inner end of the corresponding supporting rod is of the desk body In. These rods fits loosely in tubes m, which are fastened by clips m to the desk body, so that the latter, therefore, can be moved forward or backward with relation to either the standards or the chair, and can also be raised or lowered and maintained in adjusted position by inserting the rod ends in the proper openings 9' The feet 7" of the standards are suitably attached to the floor or base plate d lVhat I claimas my invention and desire to secure by Letters Patent is I 1. An adjustable chair comprising, in combination, a swinging frame, means for supporting said frame in adjusted position, an upper cross-bar adjustably connected .to the sides of said frame, a lower cross-bar suspended from the upper bar and resting against said frame sides, and a seat body connected with said bars. I

2. An adjustable chair comprising, in combination, a swinging frame having vertical side members formed with longitudinal series of openings, means for supporting said frame in adjusted position, an upper cross-bar disposed against said frame or downward and forward or p and provided with supporting devices'interchangeably engaged in said openings, a lower cross-bar suspended from the upper bar and resting against said members, and

a seat body connected with said bars.

3. An adjustable chair comprising, in Q combination, a swinging frame having vertical side members, means for supporting said frame in adjusted position, /an upper cross-bar adjustably connected with said side members, a lower cross-bar suspended from the upper bar'and resting against said members, depending back' rods pivoted at their upper ends to said upper bar, and a seat supported adjacent to its front edge by 15 a said lower cross bar and connected adjacent. 

